package edu.sctu;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by JAVA on 2018/5/17.
 */
public class Database {
    public List<User> getUserList() {
        //数据库中读取数据保存在List集合中
        List<User> userList = new ArrayList<User>();
        //3+1读取数据库保存到List中
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        String sql = "select*from t_users";
        try {
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/sctu_javaweb_2018?serverTimezone=UTC",
                    "root",
                    "123456"
            );

            statement = connection.createStatement();
            resultSet = statement.executeQuery(sql);
            while (resultSet.next()) {
                int id = resultSet.getInt(1);
                String name = resultSet.getString(2);
                String password = resultSet.getString(3);

                User user = new User();
                user.setId(id);
                user.setName(name);
                user.setPassword(password);

                userList.add(user);
            }

            resultSet.close();
            statement.close();
            connection.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return  userList;
    }
}
